1. Genus Aciculaspio Blake & Ramey-Balci, 2020
2. Genus Amphipolydora Blake, 1983
3. Genus Aonidella López-Jamar, 1989
4. Genus Aonides Claparède, 1864
5. Genus Apoprionospio Foster, 1969
6. Genus Atherospio Mackie & Duff, 1986
7. Genus Aurospio Maciolek, 1981
8. Genus Australospio Blake & Kudenov, 1978
9. Genus Boccardia Carazzi, 1893
10. Genus Boccardiella Blake & Kudenov, 1978
11. Genus Carazziella Blake & Kudenov, 1978
12. Genus Dipolydora Verrill, 1881
13. Genus Dispio Hartman, 1951
14. Genus Glandulospio Meißner, Bick, Guggolz & Götting, 2014
15. Genus Glyphochaeta Bick, 2005
16. Genus Laonice Malmgren, 1867
17. Genus Laubieriellus Maciolek, 1981
18. Genus Lindaspio Blake & Maciolek, 1992
19. Genus Malacoceros Quatrefages, 1843
20. Genus Marenzelleria Mesnil, 1896
21. Genus Microspio Mesnil, 1896
22. Genus Orthoprionospio Blake & Kudenov, 1978
23. Genus Paraprionospio Caullery, 1914
24. Genus Polydora Bosc, 1802
25. Genus Polydorella Augener, 1914
26. Genus Prionospio Malmgren, 1867
27. Genus Pseudopolydora Czerniavsky, 1881
28. Genus Pygophyllum Schmarda, 1861
29. Genus Pygospio Claparède, 1863
30. Genus Pygospiopsis Blake, 1983
31. Genus Rhynchospio Hartman, 1936
32. Genus Scolecolepides Ehlers, 1907
33. Genus Scolelepis Blainville, 1828
34. Genus Spio Fabricius, 1785
35. Genus Spiogalea Aguirrezabalaga & Ceberio, 2005
36. Genus Spiophanella Fauchald & Hancock, 1981
37. Genus Spiophanes Grube, 1860
38. Genus Streblospio Webster, 1879
39. Genus Tripolydora Woodwick, 1964
40. Genus Xandaros Maciolek, 1981
41. Genus Anaspio Chamberlin, 1920 accepted as Prionospio Malmgren, 1867 (subjective synonym)
42. Genus Aonis sensu Audouin & Milne Edwards, 1833 [Not Savigny, 1822] accepted as Scolelepis Blainville, 1828 (misapplication of Savigny's genus for Nereis caeca (Nephtyidae))
43. Genus Aonopsis Wagner, 1885 (unaccepted > nomen nudum)
44. Genus Aquilaspio Foster, 1971 accepted as Prionospio Malmgren, 1867 (subjective synonymy)
45. Genus Aricideopsis Johnson, 1901 accepted as Laonice Malmgren, 1867 (subjective synonym)
46. Genus Asetocalamyzas Tzetlin, 1985 accepted as Scolelepis Blainville, 1828 (dwarf male of a spionid, not a parasitic syllid as originally described)
47. Genus Colobranchus Schmarda, 1861 accepted as Malacoceros Quatrefages, 1843 (subjective synonym)
48. Genus Ctenospio Sars, 1867 (unaccepted > nomen nudum)
49. Genus Euspio McIntosh, 1915 accepted as Spio Fabricius, 1785 (subjective synonym)
50. Genus Hekaterobranchus Buchanan, 1890 accepted as Streblospio Webster, 1879 (subjective synonym)
51. Genus Kinbergella McIntosh, 1909 accepted as Prionospio Malmgren, 1867 (subjective synonym)
52. Genus Leipoceras Möbius, 1874 accepted as Dipolydora Verrill, 1881 (subjective synonymy of the type species)
53. Genus Leucodore Johnston, 1838 accepted as Polydora Bosc, 1802 (subjective synonym)
54. Genus Leucodorum [misspelling for Leucodore] accepted as Polydora Bosc, 1802 (deliberate misspelling)
55. Genus Mandane Kinberg, 1866 accepted as Laonice Malmgren, 1867 (subjective synonym)
56. Genus Mesospio Gravier, 1911 accepted as Microspio Mesnil, 1896 (subjective synonym)
57. Genus Minuspio Foster, 1971 accepted as Prionospio Malmgren, 1867 (subjective synonym)
58. Genus Morants Chamberlin, 1919 accepted as Spiophanes Grube, 1860 (subjective synonym)
59. Genus Neoboccardia Buzhinskaja, 1985 accepted as Boccardia Carazzi, 1893 (subjective synonym)
60. Genus Neopygospio Berkeley & Berkeley, 1954 accepted as Pseudopolydora Czerniavsky, 1881 (subjective synonym)
61. Genus Nerine Johnston, 1838 accepted as Scolelepis Blainville, 1828 (subjective synonym)
62. Genus Nerinides Mesnil, 1896 accepted as Scolelepis Blainville, 1828 (subjective synonym)
63. Genus Paraboccardia Rainer, 1973 accepted as Boccardia Carazzi, 1893 (subjective synonym)
64. Genus Paraspio Czerniavsky, 1881 accepted as Spio Fabricius, 1785 (subjective synonym)
65. Genus Pasithoe Rafinesque, 1815 (unaccepted > nomen nudum, name only, no description, no species)
66. Genus Periptyches Grube, 1873 accepted as Prionospio Malmgren, 1867 (subjective synonym)
67. Genus Pseudatherospio Lovell, 1994 accepted as Pygospiopsis Blake, 1983 (subjective synonym)
68. Genus Pseudomalacoceros Czerniavsky, 1881 accepted as Scolelepis Blainville, 1828 (subjective synonym)
69. Genus Pseudonerine Augener, 1926 accepted as Scolelepis Blainville, 1828 (junior homonym, subjective synonym)
70. Genus Pteriptyches [auct. misspelling for 'Periptyches] accepted as Periptyches Grube, 1873 accepted as Prionospio Malmgren, 1867 (subsequent author misspelling)
71. Genus Scolecolepis Malmgren, 1867 accepted as Scolelepis Blainville, 1828 (unjustified spelling emendation of Scolelepis Blainville, 1828)
72. Genus Scolepis [auctt.] accepted as Scolelepis Blainville, 1828 (misspelling)
73. Genus Spionereis Sars, 1853 (unaccepted > nomen nudum, unavailable as no description)
74. Genus Spionides Webster & Benedict, 1887 accepted as Laonice Malmgren, 1867 (subjective synonym)
75. Genus Uncinia Quatrefages, 1866 accepted as Malacoceros Quatrefages, 1843 (subjective synonym)
76. Genus Cheironotus Costa, 1861 (uncertain > taxon inquirendum, disused name, with type species unidentifiable)
77. Genus Nerinopsis Ehlers, 1912 (uncertain > taxon inquirendum, based on an indeterminable spionid planktonic larva)
78. Genus Perialla Kinberg, 1866 (uncertain > taxon inquirendum, candidate nomen oblitum as senior subjective synonym)
79. Genus Polybranchia Potts, 1928 (uncertain > nomen dubium, unreplaced junior homonym; based on an unidentifiable species )
80. Genus Pseudonerine Czerniavsky, 1881 (uncertain > taxon inquirendum, type species unidentifiable)
81. Genus Spione Örsted, 1845 (uncertain > taxon inquirendum, indeterminable type species with no type)

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